The knowledge of the parasites community in marine fish is extensive. However, there is scarce information about their parasites in several fish species, such as the case of Patagonotothen tessellate (Richardson, 1845), which is a fish widely distributed and abundant on the Patagonia. The aim of this study was to determinate the community composition of parasites in P. tessellata and to establish the role of the host sex in the composition of parasites through population and community descriptors of parasites. In January 2018, 118 specimens of P. tessellata were collected from two nearby locations, Prat bay and Remota bay, Puerto Natales, Austral Chile. From the fish sample, 13 parasite species were recovered, mostly from the Phyla Nematoda and Acanthocephala. As a result, the nematode Pseudodelphis sp. followed by the acanthocephalan Hypoechinorhynchus magellanicus (Szidat, 1950) were t...